Jack



Sept. 8, 1925. 1,552,901

FJWENGRAF JACK Filed May 12,.1923

, AZ 2 M 1 INVENTOR 711M r-f BY 4. ATTORNEY$ Patented Sept. 8, 1925.

UNITED STATES PATENT OFFICE.

FREDERICK WENG-RAF, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO WILHELMINE \VENGRAF, OF CHICAGO, ILLINOIS.

JACK.

Application filed May 12, 1923. Serial ,No. 638,608.

To all whom it may concern:

Be it known that I, FREDERICK WEN- snAr, a citizen of the United States, residing at New Haven, county of New Haven, and State of Connecticut, have made a certain new and useful Invention in Jacks, of which the following is a specification.

This invention relates to safety jacks which are adapted for supporting heavy weights, and it is the object of my invention to construct a simple and reliable supporting jack which can be readily adjusted to support weights at different heights and which, when not in use, can be quickly dissembled for storage or for transportation.

A further object includes the provision of a supporting joint or knuckle provided with adjusting means for adjustably holdingthe vertically movable supporting bar at differentelevations.

Other objects will appear hereinafter, and I attain these objects by the device illustrated in the accompanying drawing, in which:

Figure 1 represents a general view showing two of my jacks in use for supporting the front end of an automobile.

Fig. 2 is a plan view taken on the line 2-2 Fig. 3.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is an enlarged View of the knuckle showing the adjusting means somewhat in detail.

Similar numerals refer to like parts throughout the several views.

In its simplest construction the essential elements of my safety supporting jack com prise a main joint or knuckle 10 having sockets l1 and securing screws 12 for holding and securing the supporting legs 13. The knuckle 10 is further provided with a collar 1d, wherein slidably fits the vertical supporting bar 15. The collar is divided diametrically into two step-like members 16, 16' for supporting the retaining pin 17, which passes through any one of the holes 18 in the vertical bar. One end of the vertical supporting bar terminates in a preferably pivotally mounted cup-shaped holding element 19 for safely holding the weight to be supported, and the other end slidably engages the collar and is supported thereby as is clearly shown in Figs. 1 and 3. It is apparent that the pin 17 may be placed in any one of the holes 18 and that the projecting ends of said pin may rest on any one of the pairs of steps 16, 16'.

My jacks are especially adapted for supporting heavy weights, as the end of motor cars, when the same undergo repairs and these jacks are particularly fitted and designed to be used as auxiliary supports in connection with my portable hoist, which I have described and claimed in my co-pending application filed on even date herewith.

While I have shown and described a specific use and application of my safety ack, it is obvious that the same is equally useful for other purposes, as for temporarily holding and supporting beams and girders in building construction and building repair work, or for other purposes, and the device may be readily assembled and applied whenever occasion arises for its use.

Having now described my invention, what I claim as new and useful and of my own invention and desire to secure by Letters Patent, is

1. In a safety jack, a supporting joint knuckle provided with a collar and radially distributed sockets, set screws in said sockets and stepped adjustment on said collar, a vertically extending supporting mem-"' ber projecting from said collar and held in elevated position by a pin passing through said member and resting on said stepped adjustment, and supporting legs hold in said sockets by said set screws.

2. In a safety jack, the combination of a tripod stand having a central opening therethrough, a collar and radially distributed sockets thereon surrounding said opening. astepped adjustment on said collar, a vertically adjustable supporting member provided with holes and having a pin for supporting said member at different level In testimony whereof I have hereunto set my hand on this 8th day of May A. D., 1923.

FREDERICK VVENGRAF. 

